======================== unified (from filesystem) ========================
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                                        'duration'  '580'
                                          'artist'  'Wladimir Kaminer'
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                                           'title'  'Die Grundfrage des vorigen Jahrhunderts'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '7'
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'loc-eur-germany'
                                             'bpm'  '134.735'
                                             'key'  '12A'
                                        'acoustid'  'ee4cb972-cf8e-4e95-add2-757108b3980a'
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Es gab keinen Sex im Sozialismus'
'TBPM' (BPM (beats per minute))                     '134.735'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-germany'
'TDOR' (Original release time)                      '2009'
'TDRC' (Recording time)                             '2009-02-09'
'TIT2' (Title/songname/content description)         'Die Grundfrage des vorigen Jahrhunderts'
'TKEY' (Initial key)                                '12A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Wladimir Kaminer'
'TPE2' (Band/orchestra/accompaniment)               'Wladimir Kaminer'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Random House Audio'
'TRCK' (Track number/Position in set)               '3/7'
'TSO2'                                              'Kaminer, Wladimir'
'TSOP' (Performer sort order)                       'Kaminer, Wladimir'
'TXXX:ASIN'                                         '3837100278'
'TXXX:Acoustid Id'                                  'ee4cb972-cf8e-4e95-add2-757108b3980a'
'TXXX:Artists'                                      'Wladimir Kaminer'
'TXXX:BARCODE'                                      '9783837100273'
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'TXXX:MusicBrainz Album Id'                         '3f2a97b7-b08f-4345-8dfe-35f2b5f2b607'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'other/audiobook'
'TXXX:MusicBrainz Artist Id'                        '779462a4-8142-4c25-b143-c5719d6371da'
'TXXX:MusicBrainz Release Group Id'                 '6af38e16-4b33-3300-b5c2-1a5674e6ae69'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'non-music'
'TXXX:lastfmtags'                                   ['hoerbuch', 'linksautonom', 'berlin', 'erzaehlung', 'humor']
'TXXX:originalyear'                                 '2009'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '1'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.47 dB'
'TXXX:replaygain_track_peak'                        '0.359544'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'8bbd7599-1f53-4e4a-900d-fad0f61531cd')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Wladimir Kaminer/wladimir kaminer - es gab keinen sex im sozialismus/03 die grundfrage des vorigen jahrhunderts.mp3
                                         'working'  None
                                         'bitrate'  191
                                    'duration_sec'  580
                                           'genre'  loc-eur-germany
                                        'filesize'  13971200
                                           'mtime'  1621629578
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe wladimir kaminer sex sozialismus 03 die grundfrage jahrhunderts loc eur germany
                                      'tag_artist'  Wladimir Kaminer
                                     'tag_release'  Es gab keinen Sex im Sozialismus
                                       'tag_title'  Die Grundfrage des vorigen Jahrhunderts
                                             'bpm'  134.735
                                    'search_title'  'des':3 'die':1 'grundfrage':2 'jahrhunderts':5 'vorigen':4
                                   'search_artist'  'kaminer':2 'wladimir':1
                                  'search_release'  'es':1 'gab':2 'im':5 'keinen':3 'sex':4 'sozialismus':6
                                     'search_rest'  '00mid':1 'die':8 'eur':12 'europe':3 'germany':13 'grundfrage':9 'jahrhunderts':10 'kaminer':5 'loc':11 'north':2 'sex':6 'sozialismus':7 'wladimir':4
                                    'search_combo'  '00mid':14 'des':3A 'die':1A,21 'es':8C 'eur':25 'europe':16 'gab':9C 'germany':26 'grundfrage':2A,22 'im':12C 'jahrhunderts':5A,23 'kaminer':7B,18 'keinen':10C 'loc':24 'north':15 'sex':11C,19 'sozialismus':13C,20 'vorigen':4A 'wladimir':6B,17
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['hoerbuch', 'linksautonom', 'berlin', 'erzaehlung', 'humor']
                                        'tag_date'  2009
                                     'discogstags'  ['non-music']

============================== file details ==============================
                                           'mtime'  1621629578.3950984  (2021-05-21 22:39:38)
                             'size'  13971200